--Gamma ray testing of welds
By: by Gilbert E. Doan ...
Series: [Lehigh university] The Institute of research. Circular -- no. 69. Science and technology, -- no. 56; Circular (Lehigh University. Institute of Research) -- no. 69. Science and technology no. 56.
Publisher: Lehigh university
Published: 1931
Place of publication: Bethlehem, Pa
Language: eng
Subjects: Radiography; Welded joints; Testing
Notes: At head of title: Lehigh university publication. vol. V, no. 12,  Dec. 1931.

Reprinted from A. S. T. M. symposium on welding. 1931.

Cover title.